macros VS gm-notes

Yeah, learning how to do other stuff in Javascript is a good way to start. But then maybe look at things like the example scripts in the community macros: https://github.com/foundry-vtt-community/macros

Have a look at the community free macro module. https://github.com/foundry-vtt-community/macros

If you code at all, then Foundry jumps even higher up the recommendation list since it's designed intentionally to allow people to build stuff and add functionality. As someone who used to mess with R20 macros and their proprietary API, this is probably one of my favorite benefits to Foundry. They have some typical documentation though if you prefer examples the community macros repo is great for that.

Read some of the shorter/simpler macros from https://github.com/foundry-vtt-community/macros to get a sense of how they work.

This macro in the FoundryVTT Community Macros GitHub repository "selects all actors of the same name on the scene." I haven't tested it, but these macros have never given me issues in the past, and I recommend checking out that repo if there's ever something you're looking for.

Quick size control (#2) is generally handled by macros. There's a macro for quickly swapping tokens between 1x1 and 2x2 in the community macros. If you want some that will just bump a token up or down 1 grid size, I can get you mine personal ones in a bit when I'm at my main computer/

buttonpushertv

Try this one: https://github.com/foundry-vtt-community/macros/blob/4e25a66ef7990dbcb0c9015b554286de147c5116/actor/5e_lay_on_hands.js

GM Notes has done well for me. Lets you add a little pinned text box to any object that only the GM can see (button for it's up at the top of the relevant object window)

check GM Notes, its compatible with 9.x

GM Notes

"update to 0.5 · syl3r86/gm-notes@0e5cba0 · GitHub" https://github.com/syl3r86/gm-notes/commit/0e5cba0d4a33122da7e72b3c16ff5d6457ea6d8d

The GM Notes module adds a special notes section to actors, items and more. It doesn't pop them out automatically though. You still need to go into the actor's sheet.

I use the GM notes module (https://github.com/syl3r86/gm-notes). It adds a new tab to all entities like actors, journal entries, items and so on where the GM can write notes which are visible only to himself